[jira] [Created] (HDFS-14107) FileContext Delete on Exit Improvements

["BELUGA BEHR (JIRA)" <ji...@apache.org>]

BELUGA BEHR created HDFS-14107:
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             Summary: FileContext Delete on Exit Improvements
                 Key: HDFS-14107
                 URL: https://issues.apache.org/jira/browse/HDFS-14107
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: fs
    Affects Versions: 3.2.0
            Reporter: BELUGA BEHR


{code:java|FileContext.java}
    synchronized (DELETE_ON_EXIT) {
      Set<Entry<FileContext, Set<Path>>> set = DELETE_ON_EXIT.entrySet();
      for (Entry<FileContext, Set<Path>> entry : set) {
        FileContext fc = entry.getKey();
        Set<Path> paths = entry.getValue();
        for (Path path : paths) {
          try {
            fc.delete(path, true);
          } catch (IOException e) {
            LOG.warn("Ignoring failure to deleteOnExit for path " + path);
          }
        }
      }
      DELETE_ON_EXIT.clear();
{code}

# Include the {{IOException}} in the logging so that admins can know why the file was not deleted
# Do not bother clearing out the data structure.  This code is only called if the JVM is going down.  Better to spend the time allowing another shutdown hook to run than to spend time cleaning this thing up.
# Use Guava {{MultiMap}} for readability
# Paths are currently stored in a {{TreeSet}}.  This set implementation orders the files by names.  It does not seem worth much to order the files.  Use a faster {{HashSet}}.



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